Delusional disorder

, previously called paranoid disorder, is a type of serious mental illness called a psychotic disorder. People who have it can't tell what's real from what is imagined. Delusions are the main symptom of delusional disorder. They're unshakable beliefs in something that isn't true or based on reality.

What is a deluded person?

Delusions are defined as fixed, false beliefs that conflict with reality. Despite contrary evidence, a person in a delusional state can't let go of these convictions. 1 Delusions are often reinforced by the misinterpretation of events. Many delusions also involve some level of paranoia.

What is deluded thinking?

A delusion is a belief that is clearly false and that indicates an abnormality in the affected person's content of thought. The false belief is not accounted for by the person's cultural or religious background or his or her level of intelligence.